Add copyright notices to missing files (#3133)

[ROCm/composable_kernel commit: 3f996ee738]

example/ck_tile/01_fmha/script/benchmark_fwd_v3.sh

@@ -1,4 +1,8 @@
 #!/bin/sh
+
+## Copyright © Advanced Micro Devices, Inc. or its affiliates.
+## SPDX-License-Identifier: MIT
+
 # TODO: run this script from CK root or build directory
 EXE="$(find . -name tile_example_fmha_fwd_v3 -type f | head -n 1)"
 VALID=0